# Array indices must be positive integers or logical values. Error in (line 8) mr(t)=mi-(​(mi-mf)*(t​./tb));

조회 수: 1 (최근 30일)
Chukwunememma Uponi 2019년 11월 29일
답변: Image Analyst 2019년 11월 29일
mi=2290000
mf=130000
tb=165
t= linspace(6.5,165,1);
mr(t)=mi-((mi-mf)*(t./tb));
mr=[]
for t=6.5:165;
mr(t)=mi-((mi-mf)*(t./tb));
end
I have no idea what's wrong with the for loop, and I don't see an error in line 8. Any help please?

댓글을 달려면 로그인하십시오.

### 채택된 답변

Stephan 2019년 11월 29일
편집: Stephan 2019년 11월 29일
I doubt you want t to have only one point. Also no for loop is needed:
mi=2290000;
mf=130000;
tb=165;
t=linspace(6.5,165);
mr=mi-((mi-mf)*(t/tb));
plot(t,mr)
##### 댓글 수: 1이전 댓글 -1개 표시이전 댓글 -1개 숨기기
Chukwunememma Uponi 2019년 11월 29일
thank you!

댓글을 달려면 로그인하십시오.

### 추가 답변 (2개)

Rafael Hernandez-Walls 2019년 11월 29일
Hi,
Yo have 2 errors. First you have the line when you define the vector time:
t=linspace(6.5,164,1) % You need to put the number of points (you have only one point)
You dont need to put mr(t), because t isnt integer and you need a integer (is a index of the vector). you need to put only this line
mr=mi-((mi-mf)*(t./tb));
You dont need the loop for
Rafael
##### 댓글 수: 1이전 댓글 -1개 표시이전 댓글 -1개 숨기기
Chukwunememma Uponi 2019년 11월 29일
thank you!

댓글을 달려면 로그인하십시오.

Image Analyst 2019년 11월 29일
You can't have the 6.5th element of an array. You can have the 6th or 7th but not the 6.5th. Your question is a FAQ, so read the FAQ on it, plus on several other common errors and other fascinating things.

댓글을 달려면 로그인하십시오.

### 카테고리

Help CenterFile Exchange에서 Logical에 대해 자세히 알아보기

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by